Process of forming an electrode
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United States of America Patent
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Jul 23, 2002
Grant Date -
N/A
app pub date -
May 31, 2001
filing date -
May 31, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of forming an electrode for a plasma arc torch is disclosed, and wherein the electrode comprises a copper holder defining an opening therein. An emissive element is secured to a cavity formed in a relatively non-emissive separator having a solid rear wall at one end thereof. The emissive element and separator are positioned within the opening defined by the copper holder such that the emissive element is surrounded by the separator and the copper holder. In this regard, the emissive element is prevented from movement along the longitudinal axis of the torch relative to the separator during a post-assembly heating step. In addition, the emissive element is not exposed to the atmosphere during the heating step, which allows a greater bond between the emissive element and the separator.
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